Colicinogeny of O55 EPEC diarrhoeagenic Escherichia coli

Bradley, D. E.

doi:10.1111/j.1574-6968.1991.tb05123.x

Cited by 5 publications

(2 citation statements)

References 8 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrary, studies on the molecular evolution of colicin plasmids with emphasis on the endonuclease types of colicins [55] have provided information that E. coli strains do have a competitive advantage inside their own intestinal habitat, since expression of several of these colicins is actually increased under anaerobic conditions and proteases appeared to be absent in the colon. The relatively high frequency of colicin encoding plasmids in isolates of pathogenic E. coli also supports this hypothesis [40,61,62]. It has been shown that upon introduction of colicinogenic E. coli, non-colicinogenic E. coli cells are displaced, indicating that colicinogeny can provide a competitive advantage [63].…”

Section: Evolutionary and Ecological Aspectsmentioning

confidence: 82%

Bacteriocin release proteins: mode of action, structure, and biotechnological application

Wal

Luirink

Oudega

1995

FEMS Microbiology Reviews

View full text Add to dashboard Cite

The mechanism by which Gram-negative bacteria like Escherichia coli secrete bacteriocins into the culture medium is unique and quite different from the mechanism by which other proteins are translocated across the two bacterial membranes, namely through the known branches of the general secretory pathway. The release of bacteriocins requires the expression and activity of a so-called bacteriocin release protein and the presence of the detergent-resistant phospholipase A in the outer membrane. The bacteriocin release proteins are highly expressed small lipoproteins which are synthesized with a signal peptide that remains stable and which accumulates in the cytoplasmic membrane after cleavage. The combined action of these stable, accumulated signal peptides, the lipid-modified mature bacteriocin release proteins (BRPs) and phospholipase A cause the release of bacteriocins. The structure and mode of action of these BRPs as well as their application in the release of heterologous proteins by E. coli is described in this review.

show abstract

Section: Evolutionary and Ecological Aspectsmentioning

confidence: 82%

Bacteriocin release proteins: mode of action, structure, and biotechnological application

Wal

Luirink

Oudega

1995

FEMS Microbiology Reviews

View full text Add to dashboard Cite

show abstract

“…The importance of colicins in population-level competition has been inferred from the high frequency with which Col plasmids are found in natural populations of E. coli (Pugsley, 1984). Several experimental studies have examined the invasion properties of Col plasmids and concluded that there are growth conditions in which possession of a Col plasmid confers a competitive advantage upon the host bacteria against conspecifics (Bradley, 1991 ;Chao & Levin, 1981). Further, studies on the molecular evolution of Col plasmids argue that there has been significant positive selection acting on colicins and related proteins (Riley, 1993a, b).…”

Section: Introductionmentioning

confidence: 99%

Can phage defence maintain colicin plasmids in Escherichia coli

Feldgarden

Golden²,

Wilson³

et al. 1995

Microbiology

View full text Add to dashboard Cite

We examined the role of plasmid-based phage defence in maintaining plasmids, using colicin plasmids in Escherichia coli as a model system. Experimental data indicated that the possession of a colicin plasmid can confer limited protection against bacteriophages. A continuous culture model, using these experimental values, indicated that the observed limited protection alone could selectively maintain colicin plasmids, without requiring a competitive advantage due to colicinogeny. Phage defence might explain the current maintenance of colicin plasmids, given the naturally occurring high levels of resistance to colicins. This model also suggests that many plasmids might be maintained in natural populations, in part, by phage resistance, including 'cryptic' plasmids for which no phenotype is known.

show abstract

A phylogenetic approach to assessing the targets of microbial warfare

Riley

Goldstone

Wertz

et al. 2003

Journal of Evolutionary Biology

View full text Add to dashboard Cite

Bacteriocins are the most abundant and diverse defense systems in bacteria. As a result of the specific mechanisms of bacteriocin recognition and translocation into the target cell it is assumed that these toxins mediate intra-specific or population-level interactions. However, no published studies specifically address this question. We present here a survey of bacteriocin production in a collection of enteric bacteria isolated from wild mammals in Australia. A subset of the bacteriocin-producing strains was assayed for the ability to kill a broad range of enteric bacteria from the same bacterial collection. A novel method of estimating killing breadth was developed and used to compare the surveyed bacteriocins in terms of the phylogenetic range over which they kill. The most striking result is that although bacteriocin-producers kill members of their own species most frequently, some kill phylogenetically distant taxa more frequently than they kill closer relatives. This study calls into question the role these toxins play in natural populations. A significant number of bacteriocins are highly effective in killing inter-specific strains and thus bacteriocins may serve to mediate bacterial community interactions.

show abstract

Colicinogeny of O55 EPEC diarrhoeagenic Escherichia coli

Cited by 5 publications

References 8 publications

Bacteriocin release proteins: mode of action, structure, and biotechnological application

Bacteriocin release proteins: mode of action, structure, and biotechnological application

Can phage defence maintain colicin plasmids in Escherichia coli

A phylogenetic approach to assessing the targets of microbial warfare

Contact Info

Product

Resources

About